/*
 * Copyright 2013-2018 Lilinfeng.
 * 
 * Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with
 * the License. You may obtain a copy of the License at
 * 
 * http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on
 * an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the
 * specific language governing permissions and limitations under the License.
 */
package com.phei.netty.protocol.udp;

import io.netty.bootstrap.Bootstrap;
import io.netty.buffer.Unpooled;
import io.netty.channel.Channel;
import io.netty.channel.ChannelOption;
import io.netty.channel.EventLoopGroup;
import io.netty.channel.nio.NioEventLoopGroup;
import io.netty.channel.socket.DatagramPacket;
import io.netty.channel.socket.nio.NioDatagramChannel;
import io.netty.util.CharsetUtil;

import java.net.InetSocketAddress;

/**
 * @author lilinfeng
 * @date 2014年2月14日
 * @version 1.0
 */
public class ChineseProverbClient {

	public void run(int port) throws Exception {
		EventLoopGroup group = new NioEventLoopGroup();
		try {
			Bootstrap b = new Bootstrap();
			b.group(group).channel(NioDatagramChannel.class).option(ChannelOption.SO_BROADCAST, true)
					.handler(new ChineseProverbClientHandler());
			Channel ch = b.bind(0).sync().channel();
			// 向网段内的所有机器广播UDP消息
			ch.writeAndFlush(
					new DatagramPacket(Unpooled.copiedBuffer("谚语字典查询?", CharsetUtil.UTF_8), new InetSocketAddress(
							"255.255.255.255", port))).sync();
			if (!ch.closeFuture().await(15000)) {
				System.out.println("查询超时!");
			}
		} finally {
			group.shutdownGracefully();
		}
	}

	public static void main(String[] args) throws Exception {
		int port = 8080;
		if (args.length > 0) {
			try {
				port = Integer.parseInt(args[0]);
			} catch (NumberFormatException e) {
				e.printStackTrace();
			}
		}
		new ChineseProverbClient().run(port);
	}
}
